A triangle has angles 50°, 60°. What is the measure of the third angle?

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Multiple Choice

A triangle has angles 50°, 60°. What is the measure of the third angle?

Explanation:
The interior angles of a triangle always add up to 180 degrees. With the two given angles, 50° and 60°, their sum is 110°. The remaining angle must bring the total to 180°, so 180° − 110° = 70°. Therefore, the third angle measures 70°. If the third angle were 60°, the total would be 170°; if it were 50°, the total would be 110°; if it were 75°, the total would be 185°.

The interior angles of a triangle always add up to 180 degrees. With the two given angles, 50° and 60°, their sum is 110°. The remaining angle must bring the total to 180°, so 180° − 110° = 70°. Therefore, the third angle measures 70°. If the third angle were 60°, the total would be 170°; if it were 50°, the total would be 110°; if it were 75°, the total would be 185°.

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